Breathing tube



FIG. 1 is a top, front and left side perspective view of a breathing tube.

FIG. 2 is a left side view thereof.

FIG. 3 is a right side view thereof.

FIG. 4 is a rear view thereof.

FIG. 5 is a front view thereof.

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The references to “left,” “right,” “front,” “rear,” “top,” and “bottom” in the figure descriptions are not meant to require certain in-use orientation; the breathing tube according to the claimed design may be used in any orientation. 

CLAIM The ornamental design for a breathing tube, as shown and described. 